Lina Iyer [off-list ref] writes:

Dependent patchsets - 
        https://lkml.org/lkml/2014/8/4/767
        http://www.spinics.net/lists/linux-arm-msm/msg10799.html
        http://www.spinics.net/lists/linux-arm-msm/msg10795.html

Changes since v13:
- Return values for idle states propagated back to the cpuidle driver.
- Remove static bool cpuidle_drv_init.
- Register cpuidle driver and cpuidle device separately.
 - cpuidle device registered only when the SPM for the cpu is probed.
- Initialization changes to ensure dynamic cpuidle devices are registered only
  after the cpuidle driver is registered.
- Removed wmb, replaced with a poll loop to ensure that the SPM registers are
  written before executing wfi.
  - Added spm_register_write_sync() for write guarantees.
- Removed irrelevant return value for spm_set_low_power_mode().
- Added comments, updated module description.
- Removed Reviewed-by and Acked-by on the spm and cpuidle-qcom patches.

I think this series should also include updates to qcom_defconfig that
enable QCOM_PM and the cpuidle driver.

Then it will be enabled by default and get more broad testing.

Kevin